1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3014236504567fafdda8e9455e86c851399fa3aedff1a66e72e1c704c4548f9c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d003d0ec-647c-485a-be95-baef4d7d419e.json and https://artists.proofprofile.net/proofs/artist/d003d0ec-647c-485a-be95-baef4d7d419e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2441fe7e4c28b9b3be189c504b39b531d28b5f9c6d1999c8853446bb78c934de. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEYOK1015366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4815280e5abce1d547e32daf39ef2d005f8fc7196dff3cf9cf40436d6119f3f2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEYOK1015368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99516ff2231525be1aaf7d64ab565f6b1d770fd94e9e6c1d3b395e7dd5f84502. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEYOK1015370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1d439d9187d7484885b385b7b11996aa6f080c97724d02579fa38fb4d79405. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVSG1206107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d269c3dffd617fea92c710d8656845ed2ba28465c0bde368c89a1dc06d5736. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVSG1980701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa451f5ae21802e2ef7376087111872f12632d0b8b3fbd933982a1efa8c4c3b5c. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:03:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEYOK2405325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdf52a62c85d41910188f39e89f4912e1ba33320fe171d764fd2960d0b081e5. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:19:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEYOK2405326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97549ffa5e01b1c5ef96784a8aaf40cc8c29cb4d31ba93a2c4b6d0bc37b296a6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEYOK2405327.